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ForestLearn Trivia!
ForestLearn Trivia!
Question:
My Oak trees are covered with "GALL" balls (round growths the size of walnuts at the ends of branches). Are they the result of a wasp sting, or a result of a dysfunctional sap / root system -- perhaps a virus?
©2005 Oregon Forest Resources Institute. All Rights Reserved.
©2005 Oregon Forest Resources Institute. All Rights Reserved.